Improving current designs?

There's alot of chat in cycling circles on what works and what doesn't in all areas of design: suspension (mostly), gears and brakes. Even in rigid bikes there's discussion in what pedals better, rides better, IS better (Ti/Aluminium/carbon). So I'm curious as to what riders feel would improve bikes or have we exhausted the technology and need to get back to basics?

Discuss

NOOOO I'm not a student looking for material to beef up my thesis, just pondering really......